Bezel-Set Solitaire Round Emerald Stackable Ring for Women (3.5mm Emerald) Bezel-Set Solitaire Round Emerald Stackable Ring (3.5mm Emerald) Bezel Setting Emeralds are treated with colorless oil, wax or other colorless substance except glass or plastic to improve clarity. Free Certificate of Authenticity. Easy Returns - If you are not 100% satisfied with your purchase, you can return it for a full refund or exchange it within 30 days of the shipping date. Returns, including free gifts, must be unworn and in the state that you received them.